JPH04204614A - Afocal variable power optical system - Google Patents
Afocal variable power optical systemInfo
- Publication number
- JPH04204614A JPH04204614A JP2335935A JP33593590A JPH04204614A JP H04204614 A JPH04204614 A JP H04204614A JP 2335935 A JP2335935 A JP 2335935A JP 33593590 A JP33593590 A JP 33593590A JP H04204614 A JPH04204614 A JP H04204614A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- diopter
- magnification
- optical system
- variable power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 49
- 230000000007 visual effect Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 25
- 230000004075 alteration Effects 0.000 description 16
- 238000000034 method Methods 0.000 description 9
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/16—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
- G02B15/163—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
- G02B15/167—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
- G02B15/173—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses arranged +-+
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B15/00—Optical objectives with means for varying the magnification
- G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
- G02B15/144—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only
- G02B15/1441—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive
- G02B15/144113—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having four groups only the first group being positive arranged +-++
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、双眼鏡や単眼鋺勢に用いられるアフォーカ
ル光学系に関し、特に、倍率を変化させることができる
変倍光学系に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an afocal optical system used for binoculars or monocular lenses, and particularly to a variable power optical system that can change magnification.
（従来の技術）
一般に、双眼鏡部の接眼光学系には、使用者の視度に合
わせてフォーカスの調整ができるように視度調整機能が
設けられている。また、倍率（焦点距離）の調節ができ
るズーム光学系には、倍率を変更した時にも視度が変化
しない基準視度が設計時に決定される。(Prior Art) Generally, the eyepiece optical system of a binocular unit is provided with a diopter adjustment function so that the focus can be adjusted according to the diopter of the user. Further, in a zoom optical system whose magnification (focal length) can be adjusted, a reference diopter is determined at the time of design, so that the diopter does not change even when the magnification is changed.
視度調整のために移動されるレンズ群と変倍のために移
動されるレンズ群との少なくとも一部が重複する場合、
変倍による視度の変化を全ての視度に対して抑えること
はできない、そのため、−般的に用いられる視度を基準
視度として定め、少なくとも基準視度に設定されている
際には変倍による視度の変化が起きないように設計され
ている。When the lens group moved for diopter adjustment and the lens group moved for zooming at least partially overlap,
Changes in diopter due to magnification cannot be suppressed for all diopters. Therefore, the commonly used diopter is defined as the standard diopter, and at least when the diopter is set to the standard diopter, changes in diopter cannot be suppressed. It is designed to prevent changes in diopter due to magnification.
従って、視度が基準視度に設定されている場合には、倍
率を変更しても視度は変化しないが、視度が基準視度以
外に設定されている場合には、倍率の変更によって視度
が変化してしまい、再度視度調整を行なう必要がある。Therefore, if the diopter is set to the standard diopter, the diopter will not change even if you change the magnification, but if the diopter is set to something other than the standard diopter, changing the magnification will not change the diopter. The diopter has changed and it is necessary to adjust the diopter again.
第２１図は、従来の変倍光学系を示したものである。視
野環Ｓを境として物体側に位置する対物光学系は、固定
された第ルンズ群Ｇ１と変倍のために移動される第２レ
ンズ群Ｇ２とから構成され、視野環Ｓより眼側に位置す
る接眼光学系は、変倍のために移動される第３レンズ群
Ｇ３と固定された第４レンズ群Ｇ４とから構成される。FIG. 21 shows a conventional variable magnification optical system. The objective optical system, which is located on the object side with the viewing ring S as a boundary, is composed of a fixed lens group G1 and a second lens group G2 that is moved for zooming. The eyepiece optical system is composed of a third lens group G3 that is moved for zooming and a fourth lens group G4 that is fixed.
視度調整はミ 第２レンズ群Ｇ２、第３レンズ群Ｇ３、
Ｍ４レンズ群Ｇ４の破線で囲まれた３つのレンズ群を一
体に移動させて行なわれる。Diopter adjustment is performed by Mi second lens group G2, third lens group G3,
This is done by moving the three lens groups surrounded by broken lines, the M4 lens group G4, as one.
（発明が解決しようとする課題）
しかしながら、上述した従来の変倍光学系は、視度調整
のために移動されるレンズ群が、変倍のために機能する
レンズ群Ｇ２．Ｇ３を全て含んでいるため、変倍時に視
度調整レンズ群の焦点距離の変化が大きい、視度ズレは
、視度調整群の焦点距離の変化が小さいほど小さくなる
ため、従来の構成では視度ズレが大きくなってしまう。(Problems to be Solved by the Invention) However, in the conventional variable power optical system described above, the lens group that is moved for diopter adjustment is the lens group G2. Since it includes all G3, the change in the focal length of the diopter adjustment lens group is large when changing the magnification.The smaller the change in the focal length of the diopter adjustment lens group, the smaller the diopter deviation becomes. The degree deviation becomes large.
（発明の目的）
この発明は、上記の課題に鑑みてなされたものであり、
変倍により発生する視度ズレを低く抑えることができる
アフォーカル変倍光学系を提供することを目的とする。(Object of the invention) This invention was made in view of the above problems, and
It is an object of the present invention to provide an afocal variable power optical system that can suppress diopter deviation caused by variable power.
（課題を解決するための手段）
この発明にかかるアフォーカル変倍光学系は、上記の目
的を達成させるため、変倍のために移動される複数の変
倍レンズ群の内の一部を、視度調整のために移動させる
視度調整レンズ群に含め、残部を視度調整レンズ群がら
除外したことを特徴とする。(Means for Solving the Problems) In order to achieve the above object, an afocal variable magnification optical system according to the present invention moves a part of a plurality of variable magnification lens groups to be moved for variable magnification. It is characterized in that it is included in the diopter adjustment lens group that is moved for diopter adjustment, and the remaining part is excluded from the diopter adjustment lens group.
（実施例） 以下、二の発明を図面に基づいて説明する。(Example) The second invention will be explained below based on the drawings.
まず、この発明の詳細な説明する。First, the present invention will be explained in detail.
変倍機能を備えた単眼鏡、双眼鏡等のアフォーカル変倍
光学系は、複数のレンズ群から構成され、その少なくと
も一部が変倍のために光軸方向に移動され、同様に少な
くとも一部が視度調整のために光軸方向移動される。変
倍のために移動されるレンズ群を変倍レンズ群、視度調
整のために移動されるレンズ群を視度調整レンズ群と定
義すると、これらのレンズ群は少なくとも一部が重複す
る。Afocal magnification optical systems such as monoculars and binoculars with a variable magnification function are composed of multiple lens groups, at least some of which are moved in the optical axis direction for variable magnification, and similarly at least some of which are moved in the optical axis direction for variable magnification. is moved in the optical axis direction for diopter adjustment. If a lens group that is moved for zooming is defined as a variable power lens group, and a lens group that is moved for diopter adjustment is defined as a diopter adjustment lens group, at least a portion of these lens groups overlap.
すなわち、あるレンズ群は、変倍レンズ群であり、かつ
、視度調整レンズ群でもあることとなる。That is, a certain lens group is both a variable power lens group and a diopter adjustment lens group.
前述したように、視度が基準視度以外に設定されている
場合、変倍により設定視度は変化してしまう、二こで低
倍率から高倍率に変倍した際の視度の変化量（視度ズレ
）をΔＤＩとすると、この値は以下の（１）式により求
められる。As mentioned above, if the diopter is set to a value other than the standard diopter, the set diopter will change as the magnification changes.The amount of change in diopter when changing from low to high magnification If (diopter deviation) is ΔDI, this value is obtained by the following equation (1).
ΔＤＩ ５（ＤＩＮ−ＤＩＯ）・（ｆｘｗ／ｆｘｔ）２
＝１１）ただし、
ＤＩＷ ：低倍率時の設定視度
ＤＩＯ：基準視度
ｆｘｗ ：低倍時の視度調整レンズ群の焦点距離ｆｘｔ
：高倍時の視度調整レンズ群の焦点距離（１）式から
、変倍による視度ズレを低く抑えるためには、視度調整
のために移動される視度調整レンズ群の焦点距離の変化
を小さくすればよいことが理解できる。ΔDI 5 (DIN-DIO)・(fxw/fxt)2
=11) However, DIW: Setting diopter at low magnification DIO: Standard diopter fxw: Focal length of diopter adjustment lens group at low magnification
: Focal length of the diopter adjustment lens group at high magnification From equation (1), in order to keep the diopter deviation due to zooming low, it is necessary to change the focal length of the diopter adjustment lens group that is moved for diopter adjustment. It can be understood that it is better to make it smaller.
そこで、この発明のアフォーカル変倍光学系は、複数の
変倍レンズ群のうち一部を視度調整のために移動させる
視度調整レンズ群に含ませ、残部を視度調整レンズ群か
ら除外している。視度調整レンズ群が変倍レンズ群の一
部のみしか含まない場合には、変倍レンズ群全体を含む
場合と比較して変倍時の視度調整レンズ群の焦点距離の
変化が小さく、視度ズレを小さく抑えることができる。Therefore, in the afocal variable power optical system of the present invention, a part of the plurality of variable power lens groups is included in the diopter adjustment lens group that is moved for diopter adjustment, and the remaining part is excluded from the diopter adjustment lens group. are doing. When the diopter adjustment lens group includes only a part of the variable power lens group, the change in focal length of the diopter adjustment lens group when changing the power is smaller than when the entire variable power lens group is included. Diopter deviation can be kept small.
第１図は、発明の一実施例として４群ズームレンズを示
している。FIG. 1 shows a four-group zoom lens as an embodiment of the invention.
視野環Ｓを境として物体側に位置する対物光学系は、固
定された第ルンズ群Ｇｌと変倍のために移動される第２
レンズ群Ｇ２とから構成され、視野環Ｓより眼側に位置
する接眼光学系は、変倍のために移動される第３レンズ
群Ｇ３と固定された第４レンズ群Ｇ４とから構成される
。視度調整は、第３レンズ群Ｇ３、第４レンズ群Ｇ４の
破線で囲まれた２つのレンズ群を一体に移動させて行な
われる。The objective optical system, which is located on the object side with the field of view S as the boundary, consists of a fixed lens group Gl and a second lens group that is moved for zooming.
The eyepiece optical system is composed of a lens group G2 and is located closer to the eye than the viewing ring S. The eyepiece optical system is composed of a third lens group G3 that is moved for zooming and a fixed fourth lens group G4. The diopter adjustment is performed by integrally moving the two lens groups surrounded by the broken line, the third lens group G3 and the fourth lens group G4.
すなわち、第３レンズ群Ｇ３は変倍レンズ群であって視
度調整レンズ群にも含まれ、第２レンズ群Ｇ２は変倍レ
ンズ群であるが視度調整レンズ群からは除外されている
。That is, the third lens group G3 is a variable power lens group and is also included in the diopter adjustment lens group, and the second lens group G2 is a variable power lens group but is excluded from the diopter adjustment lens group.
第２図は、同一構成の４群ズームレンズにおいて、上記
第１図の方式で視度調整を行なう場合と、第２１図に示
した従来の方式で視度調整を行なった場合との視度ズレ
の値を示すものである。実線が実施例の方式、破線が従
来の方式である。なお、第２図は、後述するレンズ構成
例２における数値を示している。Figure 2 shows the diopter of a four-group zoom lens with the same configuration when the diopter is adjusted using the method shown in Figure 1 above and when the diopter is adjusted using the conventional method shown in Figure 21. This indicates the value of the deviation. The solid line is the method of the embodiment, and the broken line is the conventional method. Note that FIG. 2 shows numerical values in lens configuration example 2, which will be described later.
第２図からも理解できるように、変倍レンズ群の少なく
とも一部が視度調整レンズ群から除外された場合には、
変倍レンズの全てが視度調整レンズ群に含まれる場合と
比較して、視度ズレを小さく抑えることができる。As can be understood from FIG. 2, when at least a part of the variable power lens group is excluded from the diopter adjustment lens group,
Compared to the case where all of the variable power lenses are included in the diopter adjustment lens group, diopter deviation can be kept small.
次に、上記の光学系の具体的なレンズ構成例を３例示す
、なお、以下のレンズ構成例では、基準視度が一１デイ
オプターとなるよう設定している。Next, three specific examples of lens configurations of the above-mentioned optical system will be shown. In the following lens configuration examples, the reference diopter is set to be 11 dayopters.
〈レンズ構成例１〉
第３図、第５図、第７図はそれぞれ本発明の変倍光学系
の第１のレンズ構成例を示す図であり、第３図は低倍率
時のもの、第５図は中倍率時のもの、第７図は高倍率時
のものである。<Lens configuration example 1> Figures 3, 5, and 7 are diagrams showing the first lens configuration example of the variable magnification optical system of the present invention, respectively. Figure 5 shows the image at medium magnification, and Figure 7 shows the image at high magnification.
具体的な数値構成は表１に示されている。なお、全構成
例における表中の記号は、ｒがレンズ面の曲率半径、ｄ
がレンズ厚またはレンズ間隔、ｎがレンズの屈折率、ν
がレンズのアツベ数、ｆＯが対物光学系の焦点距離、ｆ
ｅが接眼光学系の焦点距離、ωが半画角である。基準視
度は一１デイオプターである。The specific numerical structure is shown in Table 1. In addition, the symbols in the table for all configuration examples are as follows: r is the radius of curvature of the lens surface, and d
is the lens thickness or lens spacing, n is the refractive index of the lens, ν
is the Atsube number of the lens, fO is the focal length of the objective optical system, f
e is the focal length of the eyepiece optical system, and ω is the half angle of view. The standard diopter is 11 dayopters.
本構成例ではｄ７、ｄ９、ｄ１４を変化させることによ
って倍率の変更を行い、その数値構成は表２に示されて
いる。第４面から第７面は正立プリズムの面である。In this configuration example, the magnification is changed by changing d7, d9, and d14, and the numerical configuration is shown in Table 2. The fourth to seventh surfaces are the surfaces of the erecting prism.
この構成による諸収差は低倍率時のものを第４図に、中
倍率時のものを第６図に、高倍率時のものを第８図に示
している。Various aberrations due to this configuration are shown in FIG. 4 for low magnification, FIG. 6 for medium magnification, and FIG. 8 for high magnification.
表１
面番号 ｒｄ ｎ ν１
６３．８１１ ４．７９ １．５１６３３
６４．１２ −３８．４３９ １．３１ １．
６２００４ ３６．３３ 、 −１１７．４６５
２３．７６４ ■ ３３．２６ １
．５８８８３ ５６．３５ ｃｏ
１．５８
６ Ｃｏ ３０．０９ １．５６
８８３ ５６．３７ ｃｏ 可変
８ −７０．４８０ １．３１ １．５１８３
３ ６４．１９ ２８．３９８ 可変
１０ −３２２．７１９ １．３１ １．８０５
１８ ２５．４１１ １１．４１９ ５．８２
１．７１３００ ５３．８１２ −２３．７４
９ ０．１７
１３ ５５．５６０ ３．７２ １．５１６３
３ ６４．１１４ −２１．２３８ 可変
１５ ３５．１６１ ２．５６ １．５１６３
３ ６４．１１６ −５４．７３７
表２
低倍率時 中倍率時 高倍率時
ｆ０ １００．００ １３３．９５ １５
８．９３ｆｅ １６．６９ １５．０２
１３．３６ω ３．５０＠２．５６’
″ ２．０８’ｄ７ ２３．２７
１４．４１ １０．３０ｄ９ ７．０３
２１．１３ ３１．７１ｄ１４ １２
．２８ ７．０４ ０．５７第１図に示し
た方式で視度調整を行なう場合、低倍率時に設定した視
度は中倍率、高倍率の際には表３に示したように変化す
る０表４は、比較のため同一の光学系を用い、視度調整
の方式のみを第２１図に示した従来例に従った場合の数
値を示している８表中の符号ｆｘは視度調整レンズ群の
焦点距離である。Table 1 Surface number rd n ν1
63.811 4.79 1.51633
64.12 -38.439 1.31 1.
62004 36.33, -117.465
23.764 ■ 33.26 1
．． 58883 56.35 co
1.58 6 Co 30.09 1.56
883 56.37 co variable 8 -70.480 1.31 1.5183
3 64.19 28.398 Variable 10 -322.719 1.31 1.805
18 25.411 11.419 5.82
1.71300 53.812 -23.74
9 0.17 13 55.560 3.72 1.5163
3 64.114 -21.238 Variable 15 35.161 2.56 1.5163
3 64.116 -54.737 Table 2 At low magnification At middle magnification At high magnification f0 100.00 133.95 15
8.93fe 16.69 15.02
13.36ω 3.50@2.56'
″ 2.08'd7 23.27
14.41 10.30d9 7.03
21.13 31.71d14 12
．． 28 7.04 0.57 When adjusting the diopter using the method shown in Figure 1, the diopter set at low magnification is medium, and at high magnification the diopter changes as shown in Table 3. 4 shows the numerical values when the same optical system is used for comparison and only the diopter adjustment method follows the conventional example shown in FIG. 21. 8 The symbol fx in Table 8 indicates the diopter adjustment lens group. is the focal length of
表３ ［単位：デイオプター］
低倍率時 中倍率時 高倍率時
−４，０−４，７−５，７
視−２，０−２，２−２，６
度−１，０−１，０−１，０
０、０＋Ｑ、 ２ ＋０．６
＋２．０ ＋２．７
＋３．７ｆｘ １６．６９ １５．０２
１３．３６表４ ［単位：デイオプター］
低倍率時 中倍率時 高倍率時
−４，０−７，７−１２，９
視−２，０−３，２−５，０
度−１，０−１，０−１，０
０，０＋１．２ ＋３．０＋２．０
＋５．７ ＋１０．９
ｆｘ １５．８９ １０．６４ ７．９６
〈レンズ構成例２〉
第９図、１１図、第１３図はそれぞれ本発明の変倍光学
系の第２のレンズ構成例を示すレンズ図であり、第９図
は低倍率時のもの、第１１図は中倍率時のもの、はｄ７
、ｄ９、ｄ１４を変化させることによって倍率の変更を
行い、その数値構成は表６に示される通りである。Table 3 [Unit: Dayopter] At low magnification At middle magnification At high magnification -4,0-4,7-5,7 Visual -2,0-2,2-2,6 Degrees-1,0-1,0 -1,0 0,0+Q, 2 +0.6 +2.0 +2.7
+3.7fx 16.69 15.02
13.36 Table 4 [Unit: Dayopter] At low magnification At middle magnification At high magnification -4,0-7,7-12,9 Visual -2,0-3,2-5,0 Degrees -1,0- 1,0-1,0 0,0+1.2 +3.0+2.0
+5.7 +10.9
fx 15.89 10.64 7.96
<Lens configuration example 2> Figures 9, 11, and 13 are lens diagrams showing a second lens configuration example of the variable magnification optical system of the present invention, respectively. Figure 11 is at medium magnification, is d7
, d9, and d14 to change the magnification, and the numerical structure thereof is as shown in Table 6.
この構成による諸収差は低倍率時のものを第１０図に、
中倍率時のものを第１２図に、高倍率時のものを第１４
図に示している。Various aberrations caused by this configuration are shown in Figure 10 at low magnification.
The image at medium magnification is shown in Figure 12, and the image at high magnification is shown in Figure 14.
Shown in the figure.
表５
面香号 ｒ ｄ ｎ ｖ
ｌ ５７．２３２ ４．９９ １．５１６３
３ ６４．１２ −３６．８２３ １．４５
１．６２００４ ３６．３３ −１１６．５９０
２５．８９
４ ｃｏ ２９．９３ １．５６８８３
５６．３５ ｃｏｌ、８１
６ ■ ２９．９３ １．５６８８３ ５
６．３７ ■ 可変
８ −４１．５４０ １．１８ １．５１６３３
６４．１９ ２６．１６８ 可変
１０ ５５．２３５ １．１８ １．８０５１
ｇ ２５．４１１ １０．８５７ ５．６２
１．７１３００ ５３．８１２ −２２．１９
４ ０．３６
１３ １４５．１１７ ２．６３ １．５１６３
３ ６４．１１４ −２６．７１９ 可変
１５ １ｅ、ａｅｉ ２．３６ １．５１８
３３ ６４．１１６ １４１．９４３
表６
低倍率時 中倍率時 高倍率時ｆｏ １
００．００ １３１．８４ １５５．８３ｒ
ｅ １６．４５ １４．６８ １
３．１４ω ２．６７° １．９４°
１．５８＠ｄ７ １４．３１ ７，
７７ ４．６１ｄ９ １０．２３
２２．２３ ３１．３６ｄ１４ １３．３７
？、９０ １．９３第１図に示した
方式で視度調整を行なう場合、低倍率時に設定した視度
は中倍率、高倍率の際には表７に示したよう番三変化す
る０表８は、比較のため同一の光学系を用い、視度調整
の方式のみを第２１図に示した従来例に従った場合の数
値を示している０表中の符号ｆｘは視度調整レンズ群の
焦点距離である。Table 5 Menkogo r d n v
l 57.232 4.99 1.5163
3 64.12 -36.823 1.45
1.62004 36.33 -116.590
25.89 4 co 29.93 1.56883
56.35 col, 81 6 ■ 29.93 1.56883 5
6.37 ■ Variable 8 -41.540 1.18 1.51633
64.19 26.168 Variable 10 55.235 1.18 1.8051
g 25.411 10.857 5.62
1.71300 53.812 -22.19
4 0.36 13 145.117 2.63 1.5163
3 64.114 -26.719 Variable 15 1e, aei 2.36 1.518
33 64.116 141.943 Table 6 At low magnification At middle magnification At high magnification fo 1
00.00 131.84 155.83r
e 16.45 14.68 1
3.14ω 2.67° 1.94°
1.58@d7 14.31 7,
77 4.61d9 10.23
22.23 31.36d14 13.37
? , 90 1.93 When adjusting the diopter using the method shown in Figure 1, the diopter set at low magnification is medium, and at high magnification, the diopter changes as shown in Table 7. For comparison purposes, the same optical system is used and only the diopter adjustment method follows the conventional example shown in Fig. 21. The symbol fx in the table indicates the diopter adjustment lens group. It is the focal length.
表７ ［単位：デイオプターコ
低倍率時 中倍率時 高倍率時
−４，０−４，８−５，７
視 −２，０−２，３−２，６
度−１，０−１，０−１，０
０、０＋Ｑ、 ３ ＋０．６＋２．
０ ＋２．８
＋３．７ｆｘ １６．４５ １４．６８
１３．１４表８ ［単位：デイオプター］
低倍率時 中倍率時 高倍率時
−４，０−７，６−１２，５
視−２，０−３，２−４，８
度−１，０−１，０−１，０
０、０＋１．２ ÷２．８＋２．０
＋、５．８ ＋
１０．５ｆｘ １４．５２ ９．８０
７．４１〈レンズ構成例３〉
第１５図、第１７図、第１９図はそれぞれ本発明の変倍
光学系の第３のレンズ構成例を示すレンズ図であり、第
１５図は低倍率時のもの、第１７図は中倍率時のもの、
第１９図は高倍率時のものである。なお、具体的な数値
構成は表９に示されている。なお、この例では、接眼光
学系の５つのレンズのうち、最も物体側の第ルンズと、
第４レンズとが樹脂レンズである。Table 7 [Units: Diopterco Low magnification Medium magnification High magnification -4,0-4,8-5,7 Views -2,0-2,3-2,6 degrees -1,0-1,0- 1,0 0,0+Q, 3 +0.6+2.
0 +2.8
+3.7fx 16.45 14.68
13.14 Table 8 [Unit: Dayopter] At low magnification At middle magnification At high magnification -4,0-7,6-12,5 View -2,0-3,2-4,8 Degrees -1,0- 1,0-1,0 0,0+1.2 ÷2.8+2.0
+, 5.8 +
10.5fx 14.52 9.80
7.41 <Lens configuration example 3> Figures 15, 17, and 19 are lens diagrams showing a third lens configuration example of the variable magnification optical system of the present invention, and Figure 15 shows the lens configuration at low magnification. Figure 17 is at medium magnification.
FIG. 19 shows the image at high magnification. Note that the specific numerical structure is shown in Table 9. In this example, among the five lenses of the eyepiece optical system, the lens closest to the object,
The fourth lens is a resin lens.
この構成による諸収差は低倍率時のものを第１６図に、
中倍率時のものを第１８図に、高倍率時のものを第２０
図に示している。Various aberrations caused by this configuration are shown in Figure 16 at low magnification.
The image at medium magnification is shown in Figure 18, and the image at high magnification is shown in Figure 20.
Shown in the figure.
表９
面香号 ｒ ｄ ｎ ν
１ ６４．５７３ ５．２４ １．５１６３３
６４．１２ −３３．７８６ １．５２ １
．８２００４ ３６．３３ −９５．３５２ ２８
．５７
４ ｏＯ３２，３８１，５６８８３５６，３５
（Ｘ） １．９１
６ （Ｘ） ２８．５７ １．５６８８
３ ５６．３７ ｃｏ 可変
８ −１６０．９７９ １．２４ １．４９２
５７．４９ １４．８０２ 可変
１０ −６３．５９２ １．２４ １．８０５１
８ ２５．４１１ １４．２６３ ６．５７
１．７１３００ ５３．８１２ −１７．１０４
０．３８
１３ ５０．７４４ ３．５２ １．４９２
５７．４１４ −２７．４５２ 可変
１５ ２４．４２２ ２．６７ １．５１６３
３ ６４．１１６ １８６．０４４
表１０
低倍率時 中倍率時 高倍率時
ｆＯ１００，００１３６，９５１６５，１８ｆｅ
１６．６Ｂ １５．２８ １３．９
６ω ２．６７＠１．９４” １．５８
’ｄ７ １２，３５ ５．７ｇ
２．７５ｄ９ ９．５５ ２１．５５
３０．８２ｄ１４ １２．５１ ７．０
７ ０．８４第１図に示した方式で視度調整を行
なう場合、低倍率時に設定した視度は中倍率、高倍率の
際には表１１に示したように変化する８表１２は、比較
のため同一の光学系を用い、視度調整の方式のみを第２
１図に示した従来例に従った場合の数値を示している９
表中の符号ｆｘは視度調整レンズ群の焦点距離である。Table 9 Menkogo r d n ν
1 64.573 5.24 1.51633
64.12 -33.786 1.52 1
．． 82004 36.33 -95.352 28
．． 57 4 oO32,381,5688356,35
(X) 1.91 6 (X) 28.57 1.5688
3 56.37 co variable 8 -160.979 1.24 1.492
57.49 14.802 Variable 10 -63.592 1.24 1.8051
8 25.411 14.263 6.57
1.71300 53.812 -17.104
0.38 13 50.744 3.52 1.492
57.414 -27.452 Variable 15 24.422 2.67 1.5163
3 64.116 186.044 Table 10 At low magnification At middle magnification At high magnification fO100, 00136, 95165, 18fe
16.6B 15.28 13.9
6ω 2.67@1.94” 1.58
'd7 12,35 5.7g
2.75d9 9.55 21.55
30.82d14 12.51 7.0
7 0.84 When adjusting the diopter using the method shown in Figure 1, the diopter set at low magnification changes as shown in Table 11 for medium magnification and for high magnification. For comparison, the same optical system was used, and only the diopter adjustment method was changed to the second one.
Figure 1 shows the numerical values when following the conventional example shown in Figure 9.
The symbol fx in the table is the focal length of the diopter adjustment lens group.
表１１［単位：デイオプター］
低倍率時 中倍率時 高倍率時
−４，０−４，６−５，３
視−２，０−２，２−２，４
度−１，０−１，０−１，０
０、０＋Ｑ、 ２ ＋Ｑ、４＋２．
０ ＋２．６ ４３．３ｆｘ １６．
６６ １５．２８ １３．９６表１２［単
位：デイオプター］
低倍率時 中倍率時 高倍率時
−４，０−７，７−１２，８
視−２，０−３，２−４，９
度−１，０−１，０−１，０
０，０＋１．２ ＋２．９＋２．０
す５．７ ＋１０
．８ｆｘ １４．８８ ９．９３ ７．
５０（効果）
以上説明したように、この発明によれば、変倍時の視度
調整レンズ群の焦点距離の変化の割合を低く抑えること
ができ、変倍時の視度ズレを小さ（することができる。Table 11 [Unit: Dayopter] At low magnification At middle magnification At high magnification -4,0-4,6-5,3 Visual -2,0-2,2-2,4 Degrees-1,0-1,0 -1, 0 0, 0+Q, 2 +Q, 4+2.
0 +2.6 43.3fx 16.
66 15.28 13.96 Table 12 [Unit: Dayopter] At low magnification At middle magnification At high magnification -4,0-7,7-12,8 Visual -2,0-3,2-4,9 degrees- 1,0-1,0-1,0 0,0+1.2 +2.9+2.0
5.7 +10
．． 8fx 14.88 9.93 7.
50 (Effects) As explained above, according to the present invention, it is possible to suppress the rate of change in the focal length of the diopter adjustment lens group during zooming, and to reduce diopter deviation during zooming. be able to.
第１図はこの発明にかかるアフォーカル変倍光学系の原
理を示す光学系の説明図、第２因は第１図に示した方式
と従来の方式とにおける視度ズレを示すグラフである。
第３図〜第８図は、この発明にかかるアフォーカル変倍
光学系の第１のレンズ構成例を示したものであり、第３
図は低倍率時のレンズ図、第４図は低倍率時の諸収差図
、第５図は中倍率時のレンズ図、第６図は中倍率時の諸
収差図、第７図は高倍率時のレンズ図、第８図は高倍率
時の諸収差図である。
第９図〜第１４図は、この発明にかかるアフォーカル変
倍光学系の第２のレンズ構成例を示したものであり、第
９図は低倍率時のレンズ図、１０図は低倍率時の諸収差
図、１１図は中倍率時のレンズ図、第１２図は中倍率時
の諸収差図、第１３図は高倍率時のレンズ図、第１４図
は高倍率時の諸収差図である。
第９図〜第１４図図は、この発明にかかるアフォーカル
変倍光学系の第３のレンズ構成例を示したものであり、
第１５図は低倍率時のレンズ図、第１６図は低倍率時の
諸収差図、第１７図は中倍率時のレンズ図、第１８図は
中倍率時の諸収差図、第１９図は高倍率時のレンズ図、
第２０図は高倍率時の諸収差図である。
第２１図は、従来のアフォーカル変倍光学系を示す説明
図である。
第１図
視度調整レンズ群
第２１図
視度調監レンズ群
手続補正書（自発）
平成 ３年 １０月ＩＳ日
乎成２年特許願第３３５９３５号
２、発明の名称
アフォーカル変倍光学系
３、補正をする者
事件との関係 出願人
住 所 東京都板橋区前野町２丁目３６番９号名 称
（０５２）旭光学工業株式会社明細書および図面
６、補正の内容
（１）明細書第６ページ第１３行の［・・・抑えること
ができる。」の後に以下を挿入する。
［また、第４レンズ群Ｇ４のみで視度調整することもで
きるが、Ｇ３．Ｇ４を一体で動かす方が調整に要する移
動量が少なくてすむというメリットがある。」（２）明
細書第１８ページ第１１行に［説明図である。Ｊとある
後に、行を改めて以下の説明を挿入する。
ｒ ＥＲ・・・・・・アイリング
Ｂ・・・・・・射出光束の主光線が光軸となす角度 」
（３）図面中筒４図、第６図、第８図、第１０図、第１
２図、第１４図、第１６図、第１８図、第２０図を別紙
の通りに補正する。
以 上
第４０
球面収！ 侶工き仮言 井点
収星 歪曲収戸白収正
第６回
球礪産 侶期叙！ フ隔収！
歪臼収！色収！
第１θ図
球面収差 侶ヱ士仮言 社点
収！ 歪曲収！白収産
珪取互 鰐ご仮言１ト点収！ 歪竺収！ｔ！
’ｉｓ！Ｎ
圏
第１６ツ
ＥＴ口ｂｑ！ 侶コニ字！耀マ戸
ブト点ψマ！ 歪Ｅヨ曜７遍
ε巴Ｉ！！２戸
第２０口
０収！
井点収！ 歪曲収戸FIG. 1 is an explanatory diagram of the optical system showing the principle of the afocal variable magnification optical system according to the present invention, and the second factor is a graph showing diopter deviation between the system shown in FIG. 1 and the conventional system. 3 to 8 show a first lens configuration example of the afocal variable magnification optical system according to the present invention, and a third lens configuration example is shown in FIG.
The figure is a lens diagram at low magnification, Figure 4 is a diagram of various aberrations at low magnification, Figure 5 is a lens diagram at medium magnification, Figure 6 is a diagram of various aberrations at medium magnification, and Figure 7 is a diagram of various aberrations at high magnification. FIG. 8 is a diagram of various aberrations at high magnification. 9 to 14 show a second lens configuration example of the afocal variable magnification optical system according to the present invention, FIG. 9 is a lens diagram at low magnification, and FIG. 10 is a lens diagram at low magnification. Figure 11 is a diagram of various aberrations at medium magnification, Figure 12 is a diagram of various aberrations at medium magnification, Figure 13 is a diagram of various aberrations at high magnification, and Figure 14 is a diagram of various aberrations at high magnification. be. 9 to 14 show a third lens configuration example of the afocal variable magnification optical system according to the present invention,
Figure 15 is a lens diagram at low magnification, Figure 16 is a diagram of various aberrations at low magnification, Figure 17 is a lens diagram at medium magnification, Figure 18 is a diagram of various aberrations at medium magnification, and Figure 19 is a diagram of various aberrations at low magnification. Lens diagram at high magnification,
FIG. 20 is a diagram showing various aberrations at high magnification. FIG. 21 is an explanatory diagram showing a conventional afocal variable magnification optical system. Figure 1: Diopter adjustment lens group Figure 21: Diopter adjustment lens group procedure correction document (spontaneous) October 1991 IS Japan Patent Application No. 335935 2, Title of Invention Afocal variable magnification optical system 3. Relationship with the case of the person making the amendment Applicant Address: 2-36-9 Maeno-cho, Itabashi-ku, Tokyo Name:
(052) Asahi Kogaku Kogyo Co., Ltd. Specification and Drawing 6, Contents of Correction (1) [... can be suppressed] on page 6, line 13 of the specification. '', insert the following: [Although it is also possible to adjust the diopter only with the fourth lens group G4, G3. Moving G4 as one unit has the advantage of requiring less movement for adjustment. ” (2) Page 18, line 11 of the specification [This is an explanatory diagram. After J, insert the following explanation on a new line. r ER... Eyring B... The angle that the principal ray of the emitted light beam makes with the optical axis.
(3) Figure 4, Figure 6, Figure 8, Figure 10, Figure 1 of the cylinder in the drawing
2, FIG. 14, FIG. 16, FIG. 18, and FIG. 20 are corrected as shown in the attached sheet. That’s all for No. 40: Spherical convergence! The 6th episode of the 6th round of the 20th anniversary of the 20th anniversary of the 6th time of the 6th time of the 6th time! Separate collection!
Distorted income! Color yield! Figure 1 Theta Spherical Aberration Distortion collection! Hakusei Keitori mutual Wani Gokariwa 1 point score! Distorted collection! T!
'is! N area 16th ET entrance bq! Suikoniji! Yomado
Butto point ψma! Distortion Eyo 7pen ε Tomoe I! ! 2 units, 20th unit, 0 income! Good point! distorted storage door
Claims (3)
の一部を、視度調整のために移動させる視度調整レンズ
群に含め、残部を該視度調整レンズ群から除外したこと
を特徴とするアフォーカル変倍光学系。(1) A part of the multiple variable power lens groups that are moved for zooming is included in the diopter adjustment lens group that is moved for diopter adjustment, and the rest is excluded from the diopter adjustment lens group. This is an afocal variable magnification optical system.
野環より物体側に位置する対物光学系と、視野環より眼
側に位置する接眼光学系とから構成され、少なくとも接
眼光学系の一部を移動することにより変倍を行うと共に
、前記接眼光学系を一体として光軸方向に移動すること
により、視度調整を行なうことを特徴とするアフォーカ
ル変倍光学系。(2) Consisting of an objective optical system located on the object side of the field of view ring and an eyepiece optical system located on the eye side of the field of view with a field of view environment for defining the field of view frame, at least the eyepiece optical system 1. An afocal variable magnification optical system, characterized in that the magnification is changed by moving a part of the eyepiece optical system, and the diopter is adjusted by moving the eyepiece optical system integrally in the optical axis direction.
と、変倍時に移動しない固定レンズ群とから構成され、
前記変倍レンズ群中の正レンズ群と、前記固定レンズ群
中の前記正レンズ群より眼側に位置するレンズ群とを視
度−整のために一体に移動させることを特徴とするアフ
ォーカル変倍光学系。(3) Consisting of a variable magnification lens group that is moved in the optical axis direction to change the magnification, and a fixed lens group that does not move when changing the magnification,
The afocal lens is characterized in that a positive lens group in the variable power lens group and a lens group located closer to the eye than the positive lens group in the fixed lens group are moved together to adjust the diopter. Variable magnification optical system.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2335935A JP3007680B2 (en) | 1990-11-30 | 1990-11-30 | Afocal variable power optical system |
| US07/800,118 US5491588A (en) | 1990-11-30 | 1991-11-29 | Afocal zooming optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2335935A JP3007680B2 (en) | 1990-11-30 | 1990-11-30 | Afocal variable power optical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04204614A true JPH04204614A (en) | 1992-07-27 |
| JP3007680B2 JP3007680B2 (en) | 2000-02-07 |
Family
ID=18293992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2335935A Expired - Fee Related JP3007680B2 (en) | 1990-11-30 | 1990-11-30 | Afocal variable power optical system |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5491588A (en) |
| JP (1) | JP3007680B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014181749A1 (en) * | 2013-05-08 | 2014-11-13 | コニカミノルタ株式会社 | Variable-magnification observation optics |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001242390A (en) | 2000-02-29 | 2001-09-07 | Asahi Optical Co Ltd | Eyepiece variable power optical system |
| JP3590564B2 (en) | 2000-05-10 | 2004-11-17 | ペンタックス株式会社 | Eyepiece zoom optical system |
| DE10138843C2 (en) * | 2001-08-15 | 2003-09-04 | Leica Camera Ag | Method and device for focusing and for diopter compensation in a telescope |
| JP4404608B2 (en) * | 2003-11-06 | 2010-01-27 | Ｈｏｙａ株式会社 | Telescope body and telescope |
| DE102005047594A1 (en) * | 2005-10-05 | 2007-04-12 | Carl Zeiss Jena Gmbh | Arrangement for automated adjusting of microscope to particular user, comprises electrically operated telescopic intermediate body |
| EP3568722A4 (en) * | 2017-01-13 | 2021-02-17 | Foms Inc. | Continuous zoom afocal lens assembly |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740211A (en) * | 1980-08-22 | 1982-03-05 | Canon Inc | Construction of zoom lens capable of extreme proximity photographing |
| US5136431A (en) * | 1988-12-06 | 1992-08-04 | Canon Kabushiki Kaisha | Zoom lens of the internal focus type |
| US5191475A (en) * | 1989-02-09 | 1993-03-02 | Canon Kabushiki Kaisha | Zoom lens |
| US5028125A (en) * | 1989-04-05 | 1991-07-02 | Ricoh Company, Ltd. | Zoom finder of real image type |
-
1990
- 1990-11-30 JP JP2335935A patent/JP3007680B2/en not_active Expired - Fee Related
-
1991
- 1991-11-29 US US07/800,118 patent/US5491588A/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014181749A1 (en) * | 2013-05-08 | 2014-11-13 | コニカミノルタ株式会社 | Variable-magnification observation optics |
| US9869850B2 (en) | 2013-05-08 | 2018-01-16 | Konica Minolta, Inc. | Variable-magnification observation optical system |
Also Published As
| Publication number | Publication date |
|---|---|
| US5491588A (en) | 1996-02-13 |
| JP3007680B2 (en) | 2000-02-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |